/*
 * Copyright (c) JForum Team
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the
 * above copyright notice, this list of conditions and
 * the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor
 * the names of its contributors may be used to endorse
 * or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 *
 * This file creation date: May 11, 2003 / 11:30:45 AM
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.core;

import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import net.jforum.util.ConfigKeys;

import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;

/**
 * @author Rafael Steil
 */
public class UserSessionListener implements HttpSessionListener {
	private static final Logger logger = Logger.getLogger(UserSessionListener.class);

	/**
	 * @see javax.servlet.http.HttpSessionListener#sessionCreated(javax.servlet.http.HttpSessionEvent)
	 */
	@Override
	public void sessionCreated(HttpSessionEvent event) {
	}

	/**
	 * @see javax.servlet.http.HttpSessionListener#sessionDestroyed(javax.servlet.http.HttpSessionEvent)
	 */
	@Override
	public void sessionDestroyed(HttpSessionEvent event) {
		HttpSession session = event.getSession();

		if (session == null) {
			return;
		}

		logger.info("Destroying session " + session.getId());

		ApplicationContext beanFactory = (ApplicationContext)event.getSession().getServletContext()
			.getAttribute(ConfigKeys.SPRING_CONTEXT);

		if (beanFactory == null) {
			logger.warn("Spring Context was not found. This may cause problems with unregistered user sessions");
		}
		else {
			String sessionId = session.getId();

			SessionManager sessionManager = beanFactory.getBean(SessionManager.class);

			try {
				sessionManager.storeSession(sessionId);
			}
			catch (Exception e) { }

			sessionManager.remove(sessionId);
		}
	}
}
